<template>
  <div class="app-container">
    <el-form inline>
      <!--收集用户输入的文本内容-->
      <el-form-item>
        <el-input v-model="tempSearchObj.username" placeholder="用户名" />
      </el-form-item>
      <!--查询-->
      <el-button type="primary" icon="el-icon-search" @click="search">查询</el-button>
      <!--清空-->
      <el-button type="default" @click="resetSearch">清空</el-button>
    </el-form>

    <div style="margin-bottom: 20px">
      <!--v-if="$hasBP('btn.User.add')"-->
      <el-button type="primary" @click="showAddUser" >添 加</el-button>
      <!--v-if="$hasBP('btn.User.remove')"-->
      <el-button type="danger" @click="revomveUsers" :disabled="selectedIds.length === 0" >批量删除</el-button>
    </div>

    <el-table border stripe v-loading="listLoading" :data="users" @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="55" />

      <el-table-column type="index" label="序号" width="80" align="center" />

      <el-table-column prop="username" label="用户名" width="150" />
      <el-table-column prop="nickName" label="用户昵称" />
      <el-table-column prop="roleName" label="权限列表" />

      <el-table-column prop="gmtCreate" label="创建时间" width="180" />
      <el-table-column prop="gmtModified" label="更新时间" width="180" />

      <el-table-column label="操作" width="230" align="center">
        <template slot-scope="{ row }">
          <!--v-if="$hasBP('btn.User.assgin')"-->
          <HintButton type="info" size="mini" icon="el-icon-user-solid" title="分配角色" @click="showAssignRole(row)" />
          <!--v-if="$hasBP('btn.User.update')"-->
          <HintButton type="primary" size="mini" icon="el-icon-edit" title="修改用户" @click="showUpdateUser(row)"  />
          <!--v-if="$hasBP('btn.User.remove')"-->
          <el-popconfirm :title="`确定删除 ${row.username} 吗?`" @onConfirm="removeUser(row.id)" >
            <HintButton style="margin-left: 10px" slot="reference" type="danger" size="mini" icon="el-icon-delete" title="删除用户"  />
          </el-popconfirm>
        </template>
      </el-table-column>
    </el-table>

    <el-pagination :current-page="page" :total="total" :page-size="limit" :page-sizes="[5, 10, 20, 30, 40, 50, 100]" style="padding: 20px 0" layout="prev, pager, next, jumper, ->, sizes, total" @current-change="getUsers" @size-change="handleSizeChange" />

    <el-dialog :title="user.id ? '修改用户' : '添加用户'" :visible.sync="dialogUserVisible">
      <el-form ref="userForm" :model="user" :rules="userRules" label-width="120px">
        <el-form-item label="用户名" prop="username">
          <el-input v-model="user.username" />
        </el-form-item>
        <el-form-item label="用户昵称">
          <el-input v-model="user.nickName" />
        </el-form-item>

        <el-form-item v-if="!user.id" label="用户密码" prop="password">
          <el-input v-model="user.password" />
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="cancel">取 消</el-button>
        <el-button :loading="loading" type="primary" @click="addOrUpdate">确 定</el-button>
      </div>
    </el-dialog>

    <el-dialog title="设置角色" :visible.sync="dialogRoleVisible" :before-close="resetRoleData">
      <el-form label-width="80px">
        <el-form-item label="用户名">
          <el-input disabled :value="user.username"></el-input>
        </el-form-item>

        <el-form-item label="角色列表">
          <el-checkbox :indeterminate="isIndeterminate" v-model="checkAll" @change="handleCheckAllChange">全选</el-checkbox>
          <div style="margin: 15px 0"></div>
          <el-checkbox-group v-model="userRoleIds" @change="handleCheckedChange">
            <el-checkbox v-for="role in allRoles" :key="role.id" :label="role.id">{{ role.roleName }}</el-checkbox>
          </el-checkbox-group>
        </el-form-item>
      </el-form>

      <div slot="footer">
        <!--保存,角色授权-->
        <el-button :loading="loading" type="primary" @click="assignRole">保存</el-button>
        <el-button @click="resetRoleData">取消</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import cloneDeep from 'lodash/cloneDeep'

export default {
  name: 'AclUserList',

  data() {
    return {
      listLoading: false, // 是否显示列表加载的提示
      searchObj: {
        // 包含请求搜索条件数据的对象
        username: ''
      },
      tempSearchObj: {
        // 收集搜索条件输入的对象
        username: ''
      },
      selectedIds: [], // 所有选择的user的id的数组
      users: [], // 当前页的用户列表
      page: 1, // 当前页码
      limit: 5, // 每页数量
      total: 0, // 总数量
      user: {}, // 当前要操作的user
      dialogUserVisible: false, // 是否显示用户添加/修改的dialog
      userRules: {
        // 用户添加/修改表单的校验规则
        username: [
          { required: true, message: '用户名必须输入' },
          { min: 4, message: '用户名不能小于4位' }
        ],
        password: [{ required: true, validator: this.validatePassword }]
      },
      loading: false, // 是否正在提交请求中
      dialogRoleVisible: false, // 是否显示角色Dialog
      allRoles: [], // 所有角色列表
      userRoleIds: [], // 用户的角色ID的列表
      isIndeterminate: false, // 是否是不确定的
      checkAll: false // 是否全选
    }
  },

  created() {
    this.getUsers()
  },

  methods: {
    /*
    显示指定角色的界面
    */
    showAssignRole(user) {
      this.user = user
      this.dialogRoleVisible = true
      this.getRoles()
    },

    /*
    全选勾选状态发生改变的监听
    */
    handleCheckAllChange(value) {
      // value 当前勾选状态true/false
      // 如果当前全选, userRoleIds就是所有角色id的数组, 否则是空数组
      this.userRoleIds = value ? this.allRoles.map((item) => item.id) : []
      // 如果当前不是全选也不全不选时, 指定为false
      this.isIndeterminate = false
    },

    /*
    异步获取用户的角色列表
    */
    async getRoles() {
      const result = await this.$api.user.getRoles(this.user.id)
      const { allRolesList, assignRoles } = result.data
      this.allRoles = allRolesList
      this.userRoleIds = assignRoles.map((item) => item.id)
      this.checkAll = allRolesList.length === assignRoles.length
      // 如果想要设置这个全选的框框,是全选的状态还是不全选或者是不确定是否都选中了
      // isIndeterminate这个属性值是false
      // 如果 isIndeterminate属性值是true,那么此时是全选

      this.isIndeterminate =
        assignRoles.length > 0 && assignRoles.length < allRolesList.length
    },

    /*
    角色列表选中项发生改变的监听
    */
    handleCheckedChange(value) {
      const { userRoleIds, allRoles } = this
      this.checkAll =
        userRoleIds.length === allRoles.length && allRoles.length > 0
      this.isIndeterminate =
        userRoleIds.length > 0 && userRoleIds.length < allRoles.length
    },

    /*
    请求给用户进行角色授权
    */
    async assignRole() {
      const userId = this.user.id
      // 把收集到的角色的id保存在数组中，然后取出使用
      const roleIds = this.userRoleIds.join(',')
      this.loading = true
      const result = await this.$api.user.assignRoles(userId, roleIds)
      this.loading = false
      this.$message.success(result.message || '分配角色成功')
      this.resetRoleData()

      // console.log(this.$store.getters.name, this.user)
      if (this.$store.getters.name === this.user.username) {
        window.location.reload()
      }
    },

    /*
    重置用户角色的数据
    */
    resetRoleData() {
      this.dialogRoleVisible = false
      this.allRoles = []
      this.userRoleIds = []
      this.isIndeterminate = false
      this.checkAll = false
    },

    /*
    自定义密码校验
    */
    validatePassword(rule, value, callback) {
      if (!value) {
        callback('密码必须输入')
      } else if (!value || value.length < 6) {
        callback('密码不能小于6位')
      } else {
        callback()
      }
    },
    /*
    根据输入进行搜索
    */
    search() {
      // 用户输入的数据在一个临时对象的username中存储
      // 把对象中的username属性解构出来,给了searchObj属性
      this.searchObj = { ...this.tempSearchObj }
      this.getUsers()
    },

    /*
    重置输入后搜索
    */
    resetSearch() {
      this.searchObj = {
        username: ''
      }
      this.tempSearchObj = {
        username: ''
      }
      this.getUsers()
    },

    /*
    显示添加用户的界面
    */
    showAddUser() {
      this.user = {}
      this.dialogUserVisible = true

      this.$nextTick(() => this.$refs.userForm.clearValidate())
    },

    /*
    删除所有选中的用户
    */
    revomveUsers() {
      this.$confirm('确定删除吗?')
        .then(async () => {
          await this.$api.user.removeUsers(this.selectedIds)
          this.$message.success('删除成功')
          this.getUsers()
        })
        .catch(() => {
          this.$message.info('取消删除')
        })
    },

    /*
    列表选中状态发生改变的监听回调
    */
    handleSelectionChange(selection) {
      this.selectedIds = selection.map((item) => item.id)
    },

    /*
    显示更新用户的界面
    */
    showUpdateUser(user) {
      this.user = cloneDeep(user)
      this.dialogUserVisible = true
    },

    /*
    删除某个用户
    */
    async removeUser(id) {
      await this.$api.user.removeById(id)
      this.$message.success('删除成功')
      this.getUsers(this.users.length === 1 ? this.page - 1 : this.page)
    },

    /*
    获取分页列表
    */
    async getUsers(page = 1) {
      this.page = page
      const { limit, searchObj } = this
      this.listLoading = true
      //      this.searchObj = { ...this.tempSearchObj }
      const result = await this.$api.user.getPageList(page, limit, searchObj)
      this.listLoading = false
      const { items, total } = result.data
      this.users = items.filter((item) => item.username !== 'admin')
      this.total = total - 1
      this.selectedIds = []
    },

    /*
    处理pageSize发生改变的监听回调
    */
    handleSizeChange(pageSize) {
      this.limit = pageSize
      this.getUsers()
    },

    /*
    取消用户的保存或更新
    */
    cancel() {
      this.dialogUserVisible = false
      this.user = {}
    },

    /*
    保存或者更新用户
    */
    addOrUpdate() {
      this.$refs.userForm.validate((valid) => {
        if (valid) {
          const { user } = this
          this.loading = true
          this.$api.user[user.id ? 'update' : 'add'](user).then((result) => {
            this.loading = false
            this.$message.success('保存成功!')
            this.getUsers(user.id ? this.page : 1)
            this.user = {}
            this.dialogUserVisible = false
          })
        }
      })
    }
  }
}
</script>


